X992

INTERSECTION OF LINES X2X_6 AND X9X_39

< A B C >: Reference Triangle △ABC [ A B ]: Sideline AB (Base c = 1) [ B C ]: Sideline BC (Side a) [ C A ]: Sideline CA (Side b) { 2, 6 }: Centroid–Symmedian Line { 9, 39 }: Central Line L(9, 39) { 44, 583 }: Central Line L(44, 583) { 238, 1009 }: Central Line L(238, 1009) A = Vertex A (0.0000, 0.0000) B = Vertex B (1.0000, 0.0000) C = Vertex C (0.6122, 0.5999) X_2 = CENTROID (0.5374, 0.2000) X_6 = SYMMEDIAN POINT (LEMOINE POINT, GREBE POINT) (0.6000, 0.2672) X_9 = MITTENPUNKT (0.5110, 0.1615) X_39 = BROCARD MIDPOINT (0.5778, 0.2305) X_44 = -LINE CONJUGATE OF X(1) (2.1429, 2.0996) X_583 = ORTHOGONAL OF X(500) (0.6638, 0.3726) X_238 = -LINE CONJUGATE OF X(37) (1.6190, 1.4775) X_1009 = INTERCEPT OF EULER LINE AND LINE X(1)X(39) (0.5532, 0.2412) X_992 = INTERSECTION OF LINES X(2)X(6) AND X(9)X(39) (0.2678, -0.0897) A B C X2 X6 X9 X39 X44 X583 X238 X1009 X992 (a, b, c) = (5, 6, 7) | AB = 1

X992 (INTERSECTION OF LINES X2X_6 AND X9X_39) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).

"""GEOMETOR construction model for X_992 = INTERSECTION OF LINES X_2X_6 AND X_9X_39."""

        from __future__ import annotations

        from pathlib import Path

        import sympy.geometry as spg
        from geometor.model import Model

        from geometor.etc.ops import (
            central_line,
            centroid_of,
            construct_baseline_triangle,
            create_model,
            eval_trilinear_point,
            mittenpunkt_of,
            promote_point_to_top,
            symmedian_point_of,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_00992(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_992 = INTERSECTION OF LINES X_2X_6 AND X_9X_39 on reference triangle ABC."""
            X_992 = eval_trilinear_point(model, A, B, C, '(a**(3)*(b + c) + a**(2)*(b**(2) + c**(2)) - a*b*c*(b + c) - b*c*(b + c)**(2))', ID="X_992", classes=["selected", "target"])
            X_2 = centroid_of(model, A, B, C, ID="X_2", classes=["center", "incident"])
            X_6 = symmedian_point_of(model, A, B, C, ID="X_6", classes=["center", "incident"])
            central_line(model, X_2, X_6, 2, 6, incident=True)
            X_9 = mittenpunkt_of(model, A, B, C, ID="X_9", classes=["center", "incident"])
            X_39 = eval_trilinear_point(model, A, B, C, 'a*(b**(2) + c**(2))', ID="X_39", classes=["center", "incident"])
            central_line(model, X_9, X_39, 9, 39, incident=True)
            X_44 = eval_trilinear_point(model, A, B, C, 'b + c - 2*a', ID="X_44", classes=["center", "incident"])
            X_583 = eval_trilinear_point(model, A, B, C, '(a*(a**(2)*b + a**(2)*c + 2*a*b*c - b**(3) - c**(3)))', ID="X_583", classes=["center", "incident"])
            central_line(model, X_44, X_583, 44, 583, incident=True)
            return promote_point_to_top(model, X_992)


        def build_model(
            sides: tuple[float, float, float] = (5.0, 6.0, 7.0),
            show_guides: bool = False,
        ) -> Model:
            """Build a `geometor.model.Model` for X_992 on the given reference triangle."""
            model = create_model('X_992 = INTERSECTION OF LINES X_2X_6 AND X_9X_39')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_00992(model, A, B, C)
            return model


        if __name__ == "__main__":
            here = Path(__file__).resolve().parent
            model_acute = build_model((5.0, 6.0, 7.0))
            model_acute.save(str(here / "x-00992.json"))
            write_center_svg(
                model_acute,
                here / "x-00992.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )